Inspection And Cleaning Of Breaker Insulation; Functional Tests; Relays And Instruments; Equipment Surfaces - Siemens SDV-4A Instruction Manual

Maintenance

Inspection And Cleaning Of Breaker Insulation

1. Perform the Spring Discharge Check on the circuit
breaker, after all control power is removed. The Spring
Discharge Check consists of 1) depressing the Trip
pushbutton, 2) then depressing the Close pushbutton,
and 3) again depressing the Trip pushbutton. All of these
controls are on the breaker operator front panel. Visu-
ally verify the Discharge condition of the springs.
2. Remove the phase barriers (when so equipped) as
shown in Figure 10.
3. Clean barriers (when so equipped), post insulators and
roof bushings using clean cloth and one of the follow-
ing cleaning solvents:
• No. 1 or No. 2 denatured alcohol
• Isopropyl or isobutyl alcohol
4. Reinstall all barriers (when so equipped). Check all vis-
ible fasteners again for condition and tightness
Do not use any cleaning compounds containing
chlorinated hydrocarbons such as trichlorethylene,
perchlorethylene or carbon tetrachloride.
These compounds will damage the phenlylene ether
copolymer material used in the barriers and other
insulation on the circuit breaker.

Functional Tests

Refer to the Installation Checklist in the Installation Checks
and Initial Functional Tests section of this manual. Func-
tional tests consist of performing at least three (3) Manual
Spring Charging Checks and three (3) Automatic Spring
Charging Checks. After these tests are complete, and the
springs fully discharged, all fasteners and connections are
checked again for tightness and condition before placing
the breaker back in service.

Relays and Instruments

The breaker can be equipped with a relay panel when re-
quired. A relay package can be supplied on a hinged panel
mounted in the front of the control compartment.
To insure satisfactory operation of relays and instruments
do not leave device covers off longer than necessary. When
a cover has been broken, cover the device temporarily and
replace broken cover as soon as possible.
Refer to the wiring and schematic diagrams, and other in-
struction literature shipped with the breaker for additional
specific relay requirements.

Equipment Surfaces

Inspect the painted surfaces and touch up scratches as nec-
essary. ANSI-61 touchup paint is available from Siemens.
This paint matches the unit and is thinned and ready for
use in one pint (473mm 3 ) spray cans.
Inspect interior of unit for entrance of moisture and repair
as necessary.
Inspect ventilation filters, clean or replace as appropriate.
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